EP1055152B1 - Device for wide-angle projection - Google Patents

Device for wide-angle projection Download PDF

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Publication number
EP1055152B1
EP1055152B1 EP99908877A EP99908877A EP1055152B1 EP 1055152 B1 EP1055152 B1 EP 1055152B1 EP 99908877 A EP99908877 A EP 99908877A EP 99908877 A EP99908877 A EP 99908877A EP 1055152 B1 EP1055152 B1 EP 1055152B1
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EP
European Patent Office
Prior art keywords
tower
projector
screen
wide
angle projection
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP99908877A
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German (de)
French (fr)
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EP1055152A1 (en
Inventor
Peter Mayr
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dataframe Vertrieb Audiovisueller Kommunikationssysteme GmbH
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Dataframe Vertrieb Audiovisueller Kommunikationssysteme GmbH
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Publication of EP1055152A1 publication Critical patent/EP1055152A1/en
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    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/54—Accessories
    • G03B21/56—Projection screens
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
    • G03B21/00—Projectors or projection-type viewers; Accessories therefor
    • G03B21/14—Details
    • G03B21/28—Reflectors in projection beam

Definitions

  • the invention relates to a method and an apparatus for a wide-angle projection, especially for a simulation of a tower at an airport.
  • US-A-4 464 029 describes an apparatus for a Wide-angle projection with a projector, one spherical convex mirror and a spherically concave screen.
  • a similar device is known from US-A-5 253 116.
  • the device for a wide-angle projection according to the Claim 1 differs from that the device known from US 4,464,029 in that the centers of curvature the mirror surface and the screen match. This will achieved a very high image quality on the screen.
  • the invention has for its object with constructive simple means to create a method and a device, which is a wide-angle projection with little loss of light intensity enable.
  • the spherical convex mirror enables extreme widening of the light cone, resulting in little loss of light intensity an enormous image size with a small distance between the projector is effected.
  • the best image quality is achieved when the centers of curvature the mirror surface and the screen match or close to each other.
  • Computer-controlled light valve projectors are preferably used as projectors used.
  • the device 10 shown in FIGS. 1 and 2 for wide-angle projection simulates the environment of an airport tower and serves to train air traffic controllers.
  • the device 10 comprises a tower replica 12, the outer contour of which is in cross section (Fig. 2) has the shape of an even octagon.
  • the tower replica 12 has one arranged on a floor 15 Base 14, the surface of which forms a platform, on which control panels 16 are arranged along their circumference. Adjacent to the upper edge of the control panels 16, the Tower replica 12 a conically widening outwards Window area 18 on which a horizontally arranged Ceiling 19 connects.
  • the tower replica 12 is one Surrounded canvas 20 coaxially to the tower replica 12, which is spherically concave and extends from the bottom 15 of the Device 10 up to the height of the top surface of the ceiling 19 extends.
  • Each mirror 22a to 22e has a spherical on its side facing the canvas 20 convex mirror surface 32 (Fig. 4, Fig. 5). Between each mirror 22a to 22e and the screen 20 is one Projector 24a to 24e in an adjoining the screen 20 Recess 26 arranged in the bottom 15. Each projector 24a to 24e has a lens 28 which is in the direction of the central axis M obliquely on the respective mirror 22a to 22e is directed above.
  • a reference viewpoint B BZ which lies on the central axis M of the tower replica at a height between a viewpoint B ST of a person standing at a control panel 16 and a viewpoint B SI of a person sitting at the control panel.
  • the height of the screen 20 and its distance from the reference viewpoint B BZ are selected so that the screen extends between two straight lines g 1 and g 2 , the line g 1 extending from the reference viewpoint B BZ at an angle ⁇ 1 to the extends through the reference viewpoint B BZ horizontal H extends upwards.
  • the straight line g 2 extends from the reference point of view B BZ at an angle ⁇ 2 to the horizontal H downwards.
  • the angles ⁇ 1 and ⁇ 2 are each preferably 20 °.
  • the distance of a projector 24 from the associated mirror 22 is chosen so that each mirror 22 has the full cone of light a projector 24 can deflect on the screen 20 so that that of two neighboring mirrors 22 onto the screen 20 deflected light cone only in a small area 30 (Fig. 2) overlap on canvas 20.
  • the projectors 24a to 24e are arranged such that they cannot be seen from the viewpoints B ST and B SI , so that a person at the control panel 16 has a clear view of the screen 20.
  • the individual projectors 24a to 24e are operated by a computer controlled so that they simulated on the screen 20 Generate all-round image, that of a 360 ° view from an aircraft tower equivalent.
  • the center of curvature K L of the screen 20 and the center of curvature K a to K e of the mirrors 22a to 22e match.
  • the radius of curvature r s of the mirrors is approximately 3.34 m.
  • the radius of curvature K L of the screen is approximately 6.45 m.
  • the canvas 20 consists, for example, of fire retardant Glass fiber plastic and is coated in matt white.
  • the design of the mirror 22 is shown in more detail in FIGS. 3 to 5.
  • the mirror 22 is made of a spherical segment with a rectangular shape Outer contour (Fig. 3) formed. It preferably exists made of polished aluminum on the mirror surface 32, which with Chrome is coated. However, it is also possible to use mirrors a polished glass surface.
  • Another Possibility is a mylar film stretched on a round frame, which is arched outwards by means of air pressure, around which to achieve convex shape.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Overhead Projectors And Projection Screens (AREA)
  • Projection Apparatus (AREA)
  • Lenses (AREA)
  • Stereoscopic And Panoramic Photography (AREA)
  • Fittings On The Vehicle Exterior For Carrying Loads, And Devices For Holding Or Mounting Articles (AREA)
  • Load-Engaging Elements For Cranes (AREA)
  • Stringed Musical Instruments (AREA)

Abstract

The invention relates to a method for highly accurate wide-angle projection, according to which a light cone emanating from a projector is diverted by a convex, spherical mirror onto an essentially concave screen. The method is carried out by means of a device for wide-angle projection, comprising at least one projector (24), in front of whose lens (28) a mirror (22) with a spherically convex mirror surface (32) is arranged. The mirror surface (32) faces an essentially spherically concave screen (20).

Description

Die Erfindung betrifft ein Verfahren und eine Vorrichtung für eine Weitwinkelprojektion, die insbesondere für eine Simulation eines Towers auf einem Flughafen verwendet werden können.The invention relates to a method and an apparatus for a wide-angle projection, especially for a simulation of a tower at an airport.

Es ist aus dem Stand der Technik bekannt, für eine Weitwinkelprojektion Projektoren mit einer Fischaugenoptik zu verwenden, durch die das den Projektor verlassende Licht aufgeweitet wird. Die Herstellung dieser Fischaugenoptiken ist jedoch sehr aufwendig und erfordert höchste Präzision. Darüber hinaus entsteht bei der Verwendung einer Fischaugenoptik ein erheblicher Lichtverlust durch das Linsensystem.It is known from the prior art for wide-angle projection To use projectors with fisheye optics widened by the light leaving the projector becomes. However, the manufacture of these fisheye optics is very complex and requires maximum precision. Furthermore a significant one arises when using a fisheye optic Loss of light through the lens system.

US-A-4 464 029 beschreibt eine Vorrichtung für eine Weitwinkelprojektion mit einem Projektor, einem sphärisch konvexen Spiegel und einer sphärisch konkaven Leinwand. Eine ähnliche Vorrichtung ist aus US-A-5 253 116 bekannt.US-A-4 464 029 describes an apparatus for a Wide-angle projection with a projector, one spherical convex mirror and a spherically concave screen. A similar device is known from US-A-5 253 116.

Die Vorrichtung für eine Weitwinkelprojektion gemäß dem Patentanspruch 1 unterscheidet sich von der aus der US 4,464,029 bekannten Vorrichtung dadurch, daß die Krümmungsmittelpunkte der Spiegelfläche und der Leinwand übereinstimmen. Hierdurch wird eine sehr hohe Bildqualität auf der Leinwand erreicht.The device for a wide-angle projection according to the Claim 1 differs from that the device known from US 4,464,029 in that the centers of curvature the mirror surface and the screen match. This will achieved a very high image quality on the screen.

Bei der aus der US 4,464,029 bekannten Vorrichtung befindet sich der Spiegel auf dem Krümmungsmittelpunkt der Leinwand. Der Krümmungsmittelpunkt des Spiegels ist sehr weit von dem Krümmungsmittelpunkt der Leinwand entfernt.In the device known from US 4,464,029 the mirror on the center of curvature of the canvas. The center of curvature of the mirror is very far from that Removed the center of curvature of the canvas.

Bei dem aus der US 5,253,116 bekannten Stand der Technik ist die sphärische Leinwand konvex und die sphärische Spiegelfläche konkav ausgebildet. Die Lage der Krümmungsmittelpunkte der Leinwand und des Spiegels ist in dieser Druckschrift nicht angegeben. Den Zeichnungen läßt sich jedoch entnehmen, daß die Krümmungsmittelpunkte weit von einander entfernt sind.In the prior art known from US 5,253,116 the spherical canvas is convex and the spherical mirror surface concave. The location of the centers of curvature the canvas and the mirror is in this publication not specified. However, the drawings show that the centers of curvature are far apart are.

Der Erfindung liegt die Aufgabe zugrunde, mit konstruktiv einfachen Mitteln ein Verfahren und eine Vorrichtung zu schaffen, die eine Weitwinkelprojektion mit wenig Lichtstärkenverlust ermöglichen.The invention has for its object with constructive simple means to create a method and a device, which is a wide-angle projection with little loss of light intensity enable.

Die Aufgabe wird auch durch eine Vorrichtung gelöst wie sie in den Ansprüchen dargestellt ist. The task is also accomplished by a device solved as shown in the claims.

Der sphärisch konvexe Spiegel ermöglicht eine extreme Aufweitung des Lichtkegels, wodurch mit wenig Lichtstärkenverlust eine enorme Bildgröße bei geringem Abstand des Projektors bewirkt wird.The spherical convex mirror enables extreme widening of the light cone, resulting in little loss of light intensity an enormous image size with a small distance between the projector is effected.

Die beste Bildqualität wird erreicht, wenn die Krümmungsmittelpunkte der Spiegelfläche und der Leinwand übereinstimmen oder nahe zueinander liegen.The best image quality is achieved when the centers of curvature the mirror surface and the screen match or close to each other.

Eventuell entstehende Bildverzerrungen auf der Leinwand können durch entsprechende Leinwandform oder Bildvorverzerrung ausgeglichen werden.Possible image distortions on the canvas can compensated by appropriate canvas shape or pre-distortion become.

Als Projektoren werden vorzugsweise rechnergesteuerte Lichtventilprojektoren verwendet.Computer-controlled light valve projectors are preferably used as projectors used.

Ein Ausführungsbeispiel der Erfindung wird nachstehend anhand der Zeichnungen näher erläutert. Es zeigen

Fig. 1
eine im Querschnitt eine Vorrichtung für eine Weitwinkelprojektion, die zur Simulation eines Flughafentowers dient;
Fig. 2
eine Draufsicht auf die Vorrichtung von Fig. 1;
Fig. 3
eine Vorderansicht eines in der Vorrichtung von Fig. 1 verwendeten Spiegels;
Fig. 4
den Schnitt II-II von Fig. 3;
Fig. 5
den Schnitt III-III von Fig. 3.
An embodiment of the invention is explained below with reference to the drawings. Show it
Fig. 1
a cross-section of a device for a wide-angle projection, which is used to simulate an airport tower;
Fig. 2
a plan view of the device of Fig. 1;
Fig. 3
a front view of a mirror used in the device of Fig. 1;
Fig. 4
the section II-II of Fig. 3;
Fig. 5
the section III-III of Fig. 3rd

Die in den Fig. 1 und 2 gezeigte Vorrichtung 10 zur Weitwinkelprojektion simuliert die Umgebung eines Flughafen-Towers und dient zur Ausbildung von Fluglotsen. Die Vorrichtung 10 umfaßt einen Towernachbau 12, dessen Außenkontur im Querschnitt (Fig. 2) die Form eines gleichmäßigen Achtecks hat. The device 10 shown in FIGS. 1 and 2 for wide-angle projection simulates the environment of an airport tower and serves to train air traffic controllers. The device 10 comprises a tower replica 12, the outer contour of which is in cross section (Fig. 2) has the shape of an even octagon.

Der Towernachbau 12 weist einen auf einem Boden 15 angeordneten Sockel 14 auf, dessen Oberfläche eine Plattform bildet, auf der längs ihres Umfangs Bedienpulte 16 angeordnet sind. Angrenzend an die Oberkante der Bedienpulte 16 weist der Towernachbau 12 einen sich konisch nach außen erweiternden Fensterbereich 18 auf, an den eine waagerecht angeordnete Decke 19 anschließt. Der Towernachbau 12 wird von einer koaxial zum Towernachbau 12 angeordneten Leinwand 20 umgeben, die sphärisch konkav ausgebildet ist und sich vom Boden 15 der Vorrichtung 10 bis zur Höhe der oberen Oberfläche der Decke 19 erstreckt.The tower replica 12 has one arranged on a floor 15 Base 14, the surface of which forms a platform, on which control panels 16 are arranged along their circumference. Adjacent to the upper edge of the control panels 16, the Tower replica 12 a conically widening outwards Window area 18 on which a horizontally arranged Ceiling 19 connects. The tower replica 12 is one Surrounded canvas 20 coaxially to the tower replica 12, which is spherically concave and extends from the bottom 15 of the Device 10 up to the height of the top surface of the ceiling 19 extends.

Auf jedem Flächenabschnitt der Außenkontur des Towernachbaus 12 ist nach unten an den Fensterbereich 18 angrenzend zentral ein Spiegel 22a bis 22e befestigt. Jeder Spiegel 22a bis 22e weist auf seiner der Leinwand 20 zugewandten Seite eine sphärisch konvexe Spiegelfläche 32 (Fig. 4, Fig. 5) auf. Zwischen jedem Spiegel 22a bis 22e und der Leinwand 20 ist jeweils ein Projektor 24a bis 24e in einer an die Leinwand 20 angrenzenden Vertiefung 26 in dem Boden 15 angeordnet. Jeder Projektor 24a bis 24e weist ein Objektiv 28 auf, das in Richtung der Mittelachse M auf den jeweiligen Spiegel 22a bis 22e schräg nach oben gerichtet ist.On every surface section of the outer contour of the tower replica 12 is centrally adjacent to the window area 18 downwards a mirror 22a to 22e is attached. Each mirror 22a to 22e has a spherical on its side facing the canvas 20 convex mirror surface 32 (Fig. 4, Fig. 5). Between each mirror 22a to 22e and the screen 20 is one Projector 24a to 24e in an adjoining the screen 20 Recess 26 arranged in the bottom 15. Each projector 24a to 24e has a lens 28 which is in the direction of the central axis M obliquely on the respective mirror 22a to 22e is directed above.

Zur Auslegung der Vorrichtung 10 wurde ein Bezugsblickpunkt BBZ herangezogen, der auf der Mittelachse M des Towernachbaus auf einer Höhe zwischen einem Blickpunkt BST einer an einem Bedienpult 16 stehenden Person und einem Blickpunkt BSI einer an dem Bedienpult sitzenden Person liegt. Die Höhe der Leinwand 20 und ihr Abstand von dem Bezugsblickpunkt BBZ sind so gewählt, daß sich die Leinwand zwischen zwei Geraden g1 und g2 erstreckt, wobei die Gerade g1 sich von dem Bezugsblickpunkt BBZ aus in einem Winkel α1 zu der sich durch den Bezugsblickpunkt BBZ erstreckenden Horizontalen H nach oben erstreckt. Die Gerade g2 erstreckt sich von dem Bezugsblickpunkt BBZ aus in einem Winkel α2 zur Horizontalen H nach unten. Vorzugsweise betragen die Winkel α1 und α2 jeweils 20°.To design the device 10, a reference viewpoint B BZ was used, which lies on the central axis M of the tower replica at a height between a viewpoint B ST of a person standing at a control panel 16 and a viewpoint B SI of a person sitting at the control panel. The height of the screen 20 and its distance from the reference viewpoint B BZ are selected so that the screen extends between two straight lines g 1 and g 2 , the line g 1 extending from the reference viewpoint B BZ at an angle α 1 to the extends through the reference viewpoint B BZ horizontal H extends upwards. The straight line g 2 extends from the reference point of view B BZ at an angle α 2 to the horizontal H downwards. The angles α 1 and α 2 are each preferably 20 °.

Der Abstand eines Projektors 24 von dem zugehörigen Spiegel 22 ist so gewählt, daß jeder Spiegel 22 den vollen Lichtkegel eines Projektors 24 auf die Leinwand 20 so umlenken kann, daß sich die von zwei benachbarten Spiegeln 22 auf die Leinwand 20 umgelenkten Lichtkegel nur in einem kleinen Bereich 30 (Fig. 2) auf der Leinwand 20 überschneiden.The distance of a projector 24 from the associated mirror 22 is chosen so that each mirror 22 has the full cone of light a projector 24 can deflect on the screen 20 so that that of two neighboring mirrors 22 onto the screen 20 deflected light cone only in a small area 30 (Fig. 2) overlap on canvas 20.

Die besten Abbildungsergebnisse werden erreicht, wenn die Krümmungsmittelpunkte Ka bis Ke der Spiegel 22a bis 22e sehr nahe an dem Krümmungsmittelpunkt KL der Leinwand 20 befinden, der auf der Mittelachse M liegt, wie es in Fig. 1 gezeigt ist. Im Idealfall stimmen die Krümmungsmittelpunkte Ka bis Ke mit dem Krümmungsmittelpunkt KL überein.The best imaging results are achieved if the centers of curvature K a to K e of the mirrors 22a to 22e are very close to the center of curvature K L of the screen 20, which lies on the central axis M, as shown in FIG. 1. Ideally, the centers of curvature K a to K e coincide with the center of curvature K L.

Die Projektoren 24a bis 24e sind so angeordnet, daß sie von den Blickpunkten BST und BSI aus nicht zu erkennen sind, so daß eine Person an dem Bedienpult 16 einen freien Blick auf die Leinwand 20 hat.The projectors 24a to 24e are arranged such that they cannot be seen from the viewpoints B ST and B SI , so that a person at the control panel 16 has a clear view of the screen 20.

Die einzelnen Projektoren 24a bis 24e werden von einem Rechner so gesteuert, daß sie auf der Leinwand 20 ein simuliertes Rundumbild erzeugen, das einer 360°-Ansicht aus einem Flugzeugtower entspricht.The individual projectors 24a to 24e are operated by a computer controlled so that they simulated on the screen 20 Generate all-round image, that of a 360 ° view from an aircraft tower equivalent.

Bei einer bevorzugten Ausführungsform der Vorrichtung zur Weitwinkelprojektion stimmen der Krümmungsmittelpunkt KL der Leinwand 20 und die Krümmungsmittelpunkte Ka bis Ke der Spiegel 22a bis 22e überein. Der Krümmungsradius rs der Spiegel beträgt ungefähr 3,34 m. Der Krümmungsradius KL der Leinwand beträgt ca. 6,45 m. In a preferred embodiment of the device for wide-angle projection, the center of curvature K L of the screen 20 and the center of curvature K a to K e of the mirrors 22a to 22e match. The radius of curvature r s of the mirrors is approximately 3.34 m. The radius of curvature K L of the screen is approximately 6.45 m.

Die Leinwand 20 besteht beispielsweise aus feuerhemmendem Glasfaserkunststoff und ist mattweiß beschichtet.The canvas 20 consists, for example, of fire retardant Glass fiber plastic and is coated in matt white.

Die Ausbildung der Spiegel 22 ist in Fig. 3 bis 5 näher gezeigt. Der Spiegel 22 wird von einem Kugelsegment mit rechteckiger Außenkontur (Fig. 3) gebildet. Er besteht vorzugsweise aus auf der Spiegelfläche 32 polierten Aluminium, das mit Chrom beschichtet ist. Es ist jedoch auch möglich, Spiegel mit einer geschliffenen Glasoberfläche zu verwenden. Eine weitere Möglichkeit ist eine auf einem runden Rahmen gespannten Mylarfolie, die mittels Luftdruck nach außen gewölbt wird, um die konvexe Form zu erreichen.The design of the mirror 22 is shown in more detail in FIGS. 3 to 5. The mirror 22 is made of a spherical segment with a rectangular shape Outer contour (Fig. 3) formed. It preferably exists made of polished aluminum on the mirror surface 32, which with Chrome is coated. However, it is also possible to use mirrors a polished glass surface. Another Possibility is a mylar film stretched on a round frame, which is arched outwards by means of air pressure, around which to achieve convex shape.

Mit der beschriebenen Vorrichtung zur Weitwinkelprojektion ist es möglich, eine Geometrie auf 10 Bogenminuten genau auf der Leinwand abzubilden. Durch die Spiegel 22a bis 22e findet eine extreme Strahlaufweitung statt. Der Lichtverlust durch die Spiegel 22a bis 22e beträgt lediglich ca. 10%.With the described device for wide-angle projection it is possible to exactly define a geometry on 10 arc minutes Map canvas. One finds through the mirrors 22a to 22e extreme beam expansion takes place. The loss of light through the Level 22a to 22e is only about 10%.

Claims (5)

  1. Device for wide-angle projection comprising at least one projector (24), in front of the lens (28) thereof a mirror (22) having a spherically convex mirror surface (32) is arranged, the mirror surface (32) facing a substantially spherically concave screen (20), characterized in that the centers of curvature (Ka; Ke; KL) of the mirror surface (32) and the screen (20) correspond to each other.
  2. Device for wide-angle projection in accordance with claim 1, characterized in that the projector (24) is arranged such that it is invisible for someone observing the screen (20).
  3. Device for wide-angle projection in accordance with claim 1, characterized in that a light valve projector is used as the projector (24).
  4. Device for tower simulation purposes, comprising
    a centrally arranged tower imitation (12),
    several projectors (24) comprising lenses (28), which are arranged around the tower imitation (12) at an even angular distance, the lenses (28) facing the tower imitation (12),
    several mirrors (22) arranged around the tower imitation (12) at an even angular distance, the mirrors (22) being arranged, respectively, in front of the lens (28) of a projector (24) and having a spherically convex mirror surface (32) that faces away from the tower imitation (12), and
    a spherically concave screen (20) that surrounds the tower imitation (12), the projectors (24) and the mirrors (22).
  5. Device according to claim 4, characterized in that the centers of curvature (Ka; Ke; KL) of the mirror surface (32) and of the screen (20) correspond to each other.
EP99908877A 1998-02-11 1999-02-11 Device for wide-angle projection Expired - Lifetime EP1055152B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19805507A DE19805507A1 (en) 1998-02-11 1998-02-11 Wide angle projection device
DE19805507 1998-02-11
PCT/EP1999/000897 WO1999041641A1 (en) 1998-02-11 1999-02-11 Method and device for wide-angle projection

Publications (2)

Publication Number Publication Date
EP1055152A1 EP1055152A1 (en) 2000-11-29
EP1055152B1 true EP1055152B1 (en) 2002-07-24

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EP99908877A Expired - Lifetime EP1055152B1 (en) 1998-02-11 1999-02-11 Device for wide-angle projection

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EP (1) EP1055152B1 (en)
AT (1) ATE221214T1 (en)
CA (1) CA2325495A1 (en)
DE (3) DE19805507A1 (en)
WO (1) WO1999041641A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2868552A1 (en) * 2004-03-30 2005-10-07 Thomson Licensing Sa Projection module for e.g. overhead projector, has lens with optical axis parallel to screen, two reference mirrors for transmitting image beam from lens towards hyperbolic convex mirror which enlarges and transmits image beam
CH706805A1 (en) * 2012-08-06 2014-02-14 Haag Ag Streit Eye examination device.

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3695751A (en) * 1969-10-30 1972-10-03 Midori Kai Co Ltd Hemispherical motion picture screen
US3807849A (en) * 1970-05-15 1974-04-30 Redifon Ltd Visual display arrangements
US3880509A (en) * 1974-03-15 1975-04-29 Us Navy Wide-angle on-axis projection system
US3998532A (en) * 1974-04-08 1976-12-21 The United States Of America As Represented By The Secretary Of The Navy Wide angle single channel projection apparatus
FR2404243A1 (en) * 1977-09-21 1979-04-20 Jaulmes Philippe PROJECTION AND SHOOTING PROCESS FOR FLIGHT SIMULATOR, AND PROJECTION ROOM ALLOWING ITS IMPLEMENTATION
DE3529819C2 (en) * 1985-08-16 1994-11-03 Hertz Inst Heinrich Projection device for generating autostereoscopically viewable images
DE3618993A1 (en) * 1986-06-05 1987-12-10 Demolux Overhead projector
FR2661766B1 (en) * 1990-05-02 1992-07-03 Thomson Csf INCREASE OF THE VERTICAL FIELD OF A COLLIMATE PROJECTION SYSTEM WITH LARGE HORIZONTAL FIELD FOR FLIGHT SIMULATOR.
FR2669746B1 (en) * 1990-11-23 1994-03-04 Thomson Csf COLLIMATE VIEWING DEVICE WITH SPHERICAL MIRROR OFF-AXIS FOR A SIMULATOR.
DE4221375A1 (en) * 1992-07-01 1994-01-05 Holzer Walter Mirror for top-illumination projector - rectifies troublesome distortions which normally occur with projection angle inclined to horizontal
GB2298497B (en) * 1995-03-02 1997-05-21 Robin Christopher Colclough Image display device

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Publication number Publication date
EP1055152A1 (en) 2000-11-29
DE19805507A1 (en) 1999-08-12
DE59902117D1 (en) 2002-08-29
ATE221214T1 (en) 2002-08-15
CA2325495A1 (en) 1999-08-19
DE29803898U1 (en) 1998-05-28
WO1999041641A1 (en) 1999-08-19

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